Demountable rim.



H. BRETSCHER. nfMoUNTAsLE am.

`APPLICATION HLED 056.12. WH. 1,290,889.

Patenfd Jan. 14, 1919.

2 SHEETS ASNEEI I.

H. BRETSCHER.

DEMOUNTABLE IHM.

APPLICATION FILiD DECJZ. 19H. 1,290,889. Patend .1m14.1919.

UNITED ySl'liliTES vPATENT OFFICE.)

HANS BBETsoIiEn, F YORK, N. Y., AssIGNoR OF 0N`EHALF To FELIX sPITz'Ni.,

DEMOUNTABLE RIM.

Application filed December To all whom t mayv concern: o Be it known that I, HANS BnnTsoiiEa, a citizen of Switzerland, and a resident of the borough of Manhatten, city, county, and State of New York, have invented certain new and useful Improvementslin Demountable Rims, of which the following ris a coniplete specification.

This invention relates to dcmountable rims for vehicle wheels, used for aiixing pneumatic tires thereto, and consists in the hereinafter described construction of a deinountable rim, examples whereof are illustrated in the accompanying drawings, wherein- Figure 1 is a side elevation of my improved demountable riin, showing the lockmsections in open position ig. 2 is a side elevation of7 the riin, showing a pneumatic tire affixed thereto and 2o the locking sectipns in closed position;

3 1s arf ,elevation of a demountable rim, constructed` according to my invention, in which `the segment to which the locking sections are hinged, is made'n two parts, and of the connecting plate therefor;

Fig. 4 is an elevation showing the pneumatic4 tire affixed to this form of my iinproved demounieble rim;

Figs.v 5 to `9 are' detail views, drawn on an enlarged scale;`

Fig.` 5 is a bottoni view of the joint of the tivo A arts `of the segment of the rim shown in Fig'j with the connecting plate in positin; Y

Fig. 6 is aV sectionaliview thereof on line `6 6 indicated f'inliig. 5, Y,

f Fig1 'fish 'plan View of the yends of the segment andb of the locking sections of the rim intheir position shown in Figs. l and 3; Fig. 8 is a sectional view thereof on line 8-8 indicated ,inFigx 7, and

Fig. 9 is a plan view of' the ends of the fseginent and of the locking sect-ions in their yclosed position, they are shown in Figs.`

Specication of Letters Patent.

phirinienta'l y,

Patented J an. 14,1919. 12, iai?. serial :No.eoeme.

ble demountable rims have not successfully solved, is the capability of the interlocking means td resist' the tendency of the sections of the rim to spring apartpaiticularlylwhen the rim, with the pneumatic tire secured thereon, is carried in the holder on the we hicle as ,reserve for replacing one of those affixed 0n the Wheels, the, rim being then subjected to the jolts and vibration incidental e tol the run of the vehicle over rough roads, oi' when the rim is accidentally dropped, for instance in taking it from the holder to inount it on wheel. This defect, I believe "h asspreteiited the collapsible deni'ount-- ablerins heretofore devised,vfro`m coming into p'ra tical use.

The o ject of my invention is to so construct the means for locking the sections of the rim together that the lrim will resist the tendency of the pneumatic tire mounted thereon to collapse it, and also the 'jolts and vibration to which it is exposed when being carried in the holder on the vehicle, and when the rim, with the tire affixed ther-'etais being mounted on the fellyyof the `wheel.

A further object of my invention is to Veffeet this Without making use ofcunibersome duplicate parts, or of auxiliary devices, bv

which its serviceabilityis detnimentally af-y fected. o

With these objects in view, I have designed the sectional collapsible lrim and the particulai' interlocking features of the several sections of the rim, and the shapes of the free ends of the hinged sections, as Shown in the drawings, and as hereinafter described. if

Referring now particularly to Fig. 1, the reference numeral 11 designates the segment.

which may be termed the niainsecticn of the rim. This segment does not @inform to a true circle as will be 'seenbv comparing its outline with the dotted `line marked c, which indicates the periphery of a truecircle concentrical therewith. The objectief this i 'in iyiiaiintfiiingfthe"s'ftins'rQiandfl, lse Lchrielfv' interloc' edf 4The sections d2 mfand* lf3 aref hingedfbiie 'to tessili/cf the ends iof the' "segment i ligand them-,1re'interloekedfwhen f assassinati@ @ensei is monaten thereon; "i Thekhingin'gi of,q 'these sections,I 'which pero:V

p deviation is to utilizetlie resistancy of this 't fsegmeaetouieing so expanaen 'for assisting mits of their heilig swung (opened) inwardly, and the construction of their termini, are shown in Fig. 8. The ends of the segment 11 are recessed at 17 and the corresponding ends of the sections 12 and 13 are formed 'w ith projecting ton `ues, r tenons 18, fitting into the recesses 1 The free ends of sections 12 and 13 are also made interlocking; the end of section 12 is angularly recessed and the end of section 13 cut to correspondingly project as shown at 19 and 20 and 19 and 20 in Fig` 8. Their lengths are calculated to supplement the segment 11 to obtain a rim forming a complete circle of the size desired when the sections 12 and 13 are swung into the position shown inFigs. 2 and 4. YVhen the sections 12 and 13 are set into the circumferential line of the rim, the tenons 13 enter into the recesses 17 and the projecting end of the section 13 enters into the recessed end of section 12. By this the ends of the segment 11, to which the sections 12 and 13 are hin ed, are moved apart, and the tendency of t e segment 11 to resume its original form presses the sections l2 and 13 together, and conjointly lwith the conformation of their ends, produces a substantially rigid 'oint between these parts. The segment 11, w ich, as hereinbefore explained, does not conform to a true circle, and its resistance to being so conformed to the circumferential line of a true circle, is alone sufficient to hold the sections 12 and 13 in their interlocked position, unless a force, suliicient to overcome this tendency' of segment 11, is employed. This action of the segment 11 is reinforced by the angular shaping of the joint of the endsof these sections which deviates from the radial line of the rim, and requires the ends of the segment 11 to be spread farther apart momentarily when the sections 12 and 13 are thus being interlocke'd. This wider spreading apart of the ends of the segment 11 again required for their unlocking,oand thus also the angular shaping of tliefree ends of the hinged sections 12 and 13,` assists in preventing their accidental disengagement. When the tire casing is mounted on'the rim, the force required to unlock the ends of sections 12 and 13 must be additionally suiiicient to spread it also correspondingly.

Extended practical experience with demountable rims, constructed according to this, mv invention, has demonstrated that the ends of the hinged sections 12 and 13 are not disengaged when the rim, with the tire mounted thereon, is exposed to the vi brations, incidental to being carried on the vehicle traveling over rough roads, nor by the harder jolts it receives in the necessary handling of it when being applied to the felly of the Wheel, or b v dropping it.

To obtain lateral rigidit} of the joint. he-

tween the free ends of the hinged sections 12 and 13 the fiat part of the end of one of the sections, the section 13 in this instance, is recessed as shown in Fig. 7 at 22, and on the end of the other section, the section 12 1n thls instance, a tongue 24; is formed, snugly tting into the recess 22. In addition thereto a plate 25, having a tongue 26 formed thereon, is riveted to the tongue 24, so that it extends beyond the tongue 24, whereas the recessed portions 2S of the plate 25 are receded for a corresponding distance from the edge of the tongue 24. The plate 27, similarly riveted to the end of section 13, is recessed at 29, the recess corresponding in shape and dimensions to the tongue 26 of the plate 25. The portions 31 of the plate 27 project 4beyond the base of the recesses 22 to the same extent as the recessed portions 23 of the plate 25 are receded from the end of the tongue 24. By this arrangement a double interlockin of the sections 12 and 13 is effected, whici effectively prevents a lateral displacement of these two sections, and relieves the hinges 35 of the strain to which they would be otherwise subjected. The plates 25 and 27 and their interlocking joint, asdescribed, serve also to hold the seetions12 and 13 in proper alinement, and prevent excessive strain upon the joints of the rear ends of these sections with the ends of the segment 11'in the frequently occurring rough handling of the rim by careless or ignorant operators Vwhen the pneumatic tire 21 is being placed thereon..

To apply a pneumatic tire 21 to my 1mproved demountable rim, as shown in Figs. 2 and 4, the rim, with the hinged sections 12 and 13 in about the position shown in Fig. 1, is placed within the tire 21, the nipple of the inner tube being passed through the hole in the rim, and the edges of the casing are pressed infwithin the flanges of the segment 11. The-n the remaining part of the flanges of the casing, opposite the hinged sections 12 and 13, are pressed together and the sections 12 and 13 swu thereon. During these operations the casing is lying on the work bench, or on the floor, and the demountable rim is inside. Then these operations are completed, the casing with .the rim may be set u on the Hoor in an approxi mately vertica position and the foot of the operator set upon the joint of the free ends of the sections 12 and 13, or otherwise sufficient pressure must be applied thereon, to snap the interlockingparts into their locked position. Thereby t e segment 11 is spread to conform to the true circular line of the felly of the Wheel and the free ends of sections 12 and 13 are interlocked. The tube in the casin may then be infiated to full pressure an the rim and tire are ready to be mounted upon the wheel, or set in the holder, if it is to be carried as a reserve.

The construction of the rim as thus far described `is well suited for Wheels ofordinary sizes, but for wheels of larger sizes the segment 11 of the rim is preferably made in two parts, as shown in Fig. 3. The joint between the two parts 11a and 11b of the segment 11 is made as shown in Fig. 6, and as described with reference to the joints of the ends of the se ent l1 and the sections 12 and 13. Also in this instance a recess 36 is formed in the flanges of the part 11b and a correspondin tenon 37 at the end of the rt 11". o secure these parts iirmlytolggdther, and to produce the necessary rigid 'oint, the undercut abutments 38 are forme on each part immediately adjoining their ends. The arrangement and location of these abutment-s is shown in Fig. 5, where also the locking plate 39 is shown in elevation. These abutments yare undercut, shown in Fig. 6, and form What may be termed catch-bolts, rigidly engaging with the transverse end bars 39 of the locking plate. The abutments 38 are also beveled, as shown at 4:1 in Fig. 6, to enable the parts l1a and 11b to be brought together in an approximately angular position, whereby the outwardly projecting undercut edges of these abutments are brought sufficiently near together to enable the plate 39 to be set theregn, whereupon the interlockin of this plate with the abutnients is effected y the moving of the other ends of the parts 1la and .11h apart. The parts 11a and 11b of the segment 1l are thus joined when the tire 21 is applied thereon. The described means for thus connecting and locking together the parts 11 and l1b produce a rigid joint, the plate 39 engaging with the abutmcnts 38 and holding the parts together longitudinally and laterally. The interlocking of the tenons 37 in the recesses 36, assists in pro ducing a secure joint of the two parts, resisting their separation or displacement in a direction to, or away, from the center.l and also laterally.

For mounting. a tire casing upon the two part rim, illustrated in Figs. 3 and 4, the .two parts 11a and 11h are inserted in the easing,

laid out on the Work bench, with their free,

ends together and so that the nipple of the 'innertube may be inserted through the hole provided for it in the rim; the edges oi the casing are then pressed together and Within the flanges of each of the parts 11 and 11b. Then the plate "39 is set-upon the abutments 38 and the ends f the parts T1 and 11b, to which the sectiors 12 and 13. are hinged, 1noved i part to conform to the inner periphery of the tire casing 21. cedure is the same as hereinbefore set forth with reference to the form of the rim, illustrated in Figs. 1 and 2 of the dra-wings.

I claim as my invention: l

1. A dcniountable rim for a vehicle wheel,

The further procom rising sections, war ly, hinge( hinged to swing inandeach having a tenon on the end, snugly fitting into a correspondinglyI shaped 'recess in the end of the adjoining section; the hinged sections havin their ree ends out at an obtuse an le an fitted to interlock Awhen swung into t eir position in the peripheral line of the rim; sub-- stantially as herein shown and described.

demountable rim for a vehicle wheel, com rising sections, hinged. to swing inwar l and each having a tenori on the hinge end, snugly fitting into a correspondingly shaped recess in the end of the adjplinin section; the hinged sections having ell spondingly shaped and dimensioned recess, formed o n its free end; the free ends of these sections being thus fitted to interlock when swung into their. position iii the peripheral line of the rim; substantiallv as herein shown and described. n

3. demountable rim for a vehicle wheel comprising sections, hinged to swing inwardly, and having a tenon on one end snugly fitting into a correspondingly shaped recess in the end of the adjoining section; the hinged sections 4having their free ends cut at an obtuse angle in the plane of the rim; one of the hinged sections havino a tongue formed on its free end and the other a correspondingly shaped and diinensioned recess, adapted to receive the tongue formed on the free end of the other hinged section; a plate, having a ,tongue formed thereon, affixed upon the oigue of one of the hinged sections, a second plate, having a recess formed therein fitted to receive the ton ue formed on y the first plate, aiiixed at the edge of the recessed portion of the free end of the other hinged section, the said plates, and the free ends of the hinged sections being thus fitted to interlock when sWun into their position in the eripheral line o the rim; substantially as iierein shown and described.

4. The combination with a demountable rim for vehicle Wheels, composed of separable sections, of undercut abutments, affixed on the adjoining edges of the sections, and of a plate fit-ted to the rim and adapted to embrace the abutments and to enga e with the undercut portions thereof when t e ends of the sections are joined, thereby holding Vthe ends of the sections together; substantially as herein shown and described.

5. Means for securing together the adjoinin ends of sections of a demountable rim, tlie means comprising undercut, abutinents, one at the end of each section, and a plate, iitted to embrace the abutments, and to engage With the undercut edges thereof, when the sections are joined together; substantially as herein shown and described.

6. Means for seonrin to ether the adjoining end of sections o a emontable rim the means comprising a tenon on the end of one section und a correspondingly sha ed recess 0n the end ofthe other Sectlon; un ercut abutments, one at the end of each section, and a plate, fitted to embrace the abutments, and to engage with the undercut edges thereof, when the sections are joined together; substantially as herein shown and 1o described.

HANS BRETSCHER.

Witnesses PAULA BATES, Loman KELLER. 

